Abstract:

A curable composition including (A) a compound which has a plurality of
ethylenically unsaturated double bonds and secondary hydroxyl groups, (B)
a photopolymerization initiator, and (C) a coloring agent, is used to
provide a curable composition which exhibits excellent storage stability
such as dispersion stability even in the case where a coloring agent is
included at high concentration, highly sensitive curability by exposure,
high adhesiveness to the surface of a hardening material in a curing
region when applied in forming patterns on the surface of the hardening
material, excellent uncured region removability, and excellent pattern
formability; a color filter having colored patterns, which is formed by
using the curable composition and has excellent resolution and
adhesiveness to the support; and a manufacturing method of the coloring
filter with high productivity.

Claims:

1. A curable composition for a color filter comprising a polymerizable
compound (A), a photopolymerization initiator (B), a coloring agent (C),
and a binder resin (D) having an acid group and an unsaturated double
bond;wherein the amount of the coloring agent (C) in the curable
composition is in the range of 30 to 85 mass %, andthe acid group of the
binder resin (D) having an acid group and an unsaturated double bond is
linked on a main chain via a linking group with a main backbone of two or
more atoms, and the unsaturated double bond of the binder resin is on a
side chain.

2. The curable composition for a color filter according to claim 1,
wherein the binder resin (D) having an acid group and an unsaturated
double bond is a copolymer that includes a monomer comprising an acid
group, and a monomer comprising an unsaturated double bond, and wherein
the monomer comprising a double bond is represented by Formula (1), (2),
or (3): ##STR00066## wherein in Formulas (1)-(3), A1, A2, and
A3 are each independently an oxygen atom, a sulfur atom, or
--N(R21)-- while R21 is an optionally substituted alkyl group;
G1, G2, and G3 are each independently a divalent organic
group; X and Z are each independently an oxygen atom, a sulfur atom, or
--N(R22)-- while R22 is an optionally substituted alkyl group;
Y is an oxygen atom, a sulfur atom, an optionally substituted phenylene
group, or --N(R23)-- while R23 is an optionally substituted
alkyl group; and R1 to R20 are each independently a monovalent
organic group.

3. The curable composition for a color filter according to claim 1,
wherein the binder resin (D) having an acid group and an unsaturated
double bond can be obtained by one of the following synthesis methods (a)
or (b):(a) a method which includes using a base group to remove a proton
from a polymer including a compound represented by Formula (4-1) as the
copolymer component, thereby eliminating L, so as to obtain a polymer
having a structure represented by Formula (1), wherein L in Formula (4-1)
is an anionic releasing group; or(b) a method which includes subjecting a
polymer including a compound represented by Formula (4-2) as the
copolymer component to a base treatment to cause a releasing reaction in
a specific functional group, removing X1 and Z1 in the formula,
and forming a radically reactable group, so as to obtain a polymer having
the structure represented by Formula (1), ##STR00067## wherein in Formula
(4-1), L is an anionic releasing group; and R3 to R6, A1,
G1, and X have the same meanings as defined in Formula (1),
andwherein in Formula (4-2), R1, R2, and R3 are each
hydrogen or a monovalent organic group; A2 is an oxygen atom, a
sulfur atom, or --NR8--; G1 is an organic linking group;
R8 is hydrogen or a monovalent organic group; n is an integer of 1
to 10; R4 to R6, A1, and G1 have the same meanings as
defined in the Formula (1); and X1 is a releasing group which can be
removed by the releasing reaction.

4. The curable composition for a color filter according to claim 1,
further comprising a sensitizer.

5. The curable composition for a color filter according to claim 1,
wherein the amount of coloring material in the curable composition is 40
mass % or more.

6. A color filter having colored patterns, formed from the curable
composition for a color filter according to claim 1.

7. The color filter according to claim 6, used in an image sensor.

8. A manufacturing method for a color filter comprising:forming a colored
film formed from the curable composition for a color filter according to
claim 1, by applying the curable composition onto a support;exposing the
colored film through a mask; anddeveloping the exposed colored film to
form colored patterns.

Description:

TECHNICAL FIELD

[0001]The present invention relates to a curable composition which is
ideal for preparing a color filter used for liquid crystal display
devices (LCD), solid-state image pickup devices (such as CCD and CMOS),
and the like, a color filter formed from the curable composition, and a
manufacturing method of the color filter.

[0003]Since a liquid crystal display is more compact and exhibits
equivalent or better performance as compared to CRT which is widely used
as a display device, the liquid crystal display has been increasingly
used in place of CRT as a display device for a TV screen, a personal
computer screen, and others. Further, in recent years, the trend of
development in liquid displays has moved from a use in monitor with a
relatively small screen which is demanded in the past to a use in TV with
a large screen and high image quality.

[0004]As for the color filter for liquid crystal displays (LCD), a
substrate is increased in its size in manufacturing a large TV For a
curable composition which is used in preparing a color filter employing
such the large substrate, curability at low energy has been desired for
improving the productivity.

[0005]Further, for liquid crystal displays for a use in TVs, better image
quality than those used for monitors in the past has been demanded. That
is, the improved contrast and color purity have been demanded.

[0006]For the curable composition used in preparing a color filter, a
coloring agent (organic pigment or the like) having a further finer
particle size has been demanded for a use for improving the contrast (for
example, see JP-A No. 2006-30541).

[0007]However, when the pigment adsorption of a dispersing agent is
promoted to improve the dispersion stability upon including a pigment
having a small particle size in a curable composition, the dispersing
agent bridges between pigments thereby promoting a pigment aggregation,
and thus the storage stability such as dispersion stability, or the
developability when forming patterns with the use of the curable
composition tend to deteriorate.

[0008]In addition, since making the pigment finer increases the surface
area, the use of finely made pigment tends to increase the adding amount
of dispersing agent for a pigment dispersion in the curable composition.

[0009]Further, when a better acid value of resin to be added at the time
of dispersion is provided for attaining developability, the pigment
aggregation tends to be promoted due to an interaction of a hydrogen bond
between acid groups or the like.

[0010]When a resin is added to a curable composition after the pigment
dispersion for attaining the developability, the resin is required to be
added in a large quantity.

[0011]For a curable composition used in preparing a color filter, further
higher content of a coloring agent (organic pigment) in a solid content
has been demanded for improving the color purity. However, when a
coloring agent is included in a curable composition at high
concentration, since the content of photopolymerization initiator and
photopolymerizable monomer in a curable composition is reduced, a problem
arises in that the curability is hardly attained in an exposed part (even
if the) while curability at low energy is desired for the curable
composition.

[0012]In addition, for a curable composition which is used in preparing a
color filter for solid-state image pickup devices, curing with low energy
has been also desired. With respect to the color filter used for
solid-state image pickup devices, a colored pattern is made finer and
accordingly the pigment density in the composition is improved.

[0013]Further, in the pigment-based color filter, the content of pigment
dispersing agent in a curable composition is more likely increased due to
a pigment refinement for reducing the color irregularities caused by
relatively coarse pigment particles. As in the curable composition used
for manufacturing LCD, the increase of pigment dispersing agent content
in the curable composition tends to deteriorate the storage stability
such as dispersion stability, or the developability when forming patterns
with the use of the curable composition, and also leads to a problem such
that the curability is hardly obtained.

[0014]In order to deal with the problems such as color irregularities in
colored patterns formed, a technique of using an organic solvent-soluble
dye instead of pigment as the coloring agent has been proposed (for
example, see JP-A No. 2-127602). However, in the dye-based color filter,
problems such as polymerization inhibitory effect derived from the dye or
deteriorated storage stability such as dye precipitation had become
significant due to the increase in dye concentration.

[0015]As described above, various problems arise in the curable
composition used for preparing a color filter that, for both the cases of
use in liquid crystal displays and use in solid-state image pickup
devices, the sensitivity is low and sufficient curability cannot be
obtained because the concentration of coloring agent is increased while
the content of the photopolymerization initiator and the
photopolymerizable monomer which are the essential components for curing
the curable composition are limited; adhesiveness to a substrate is
insufficient; lowered development rate or residue formation in an
unexposed part is observed; desired patterns are very hardly formed;
dispersion stability and developability are deteriorated when the
coloring agent used is a pigment; storage stability is deteriorated such
as dye is precipitated, when the coloring agent used is a dye; and the
like.

[0016]With respect to those problems, in the past, investigation on
providing polymerizability to a resin which is introduced mainly to
provide a film formability and developability thereby improving the
sensitivity has been carried out (for example, see JP-A No. 2000-321763,
JP-A No. 2003-029018, "Color Filter new technology Trend (Color Filter
Saishin Gizyutsu Doukou)" (published by JOHOKIKO Co., Ltd.) p 85-87, and
"Advanced Technologies for LCD Color Filters (Saisentan Color Filter no
Process Gizyutsu to Chemicals)" (published by CMC Publishing Co., Ltd.) p
129-150). In addition, technologies disclosed in such can be also
mentioned. However, there are problems such as that the synthesis method
for the resins is complicated, the synthesizable structure is limited,
and the like. Also, satisfied light exposure sensitivity is not yet
obtained although such resins are used. Since the light exposure
sensitivity is not sufficient, curing in a deep area such as around a
substrate interface is insufficient thereby causing a problem such as
(deteriorated) substrate adhesion is deteriorated.

[0017]The present invention is made in the light of above considerations,
and the objects of which is to provide a curable composition for color
filter which exhibits highly sensitive curability, excellent storage
stability, and high sensitivity even in the case where a coloring agent,
which absorbs active energy ray, is included at high concentration; a
color filter which has less development residue on an unexposed part,
excellent adhesiveness to a substrate of an exposed part, and desired
pattern cross-sectional shape and highly precise colored patterns; and a
manufacturing method excellent in the color filter productivity. The task
is to achieve these objects.

DISCLOSURE OF THE INVENTION

[0018]A first aspect of the invention provides a curable composition for
color filter including a polymerizable compound (A), a
photopolymerization initiator (B), a coloring agent (C), and a binder
resin having an acid group and an unsaturated double bond (D),

[0019]wherein the content of the coloring agent (C) is in the range of 30
to 85 mass %, and

[0020]the binder resin having an acid group and an unsaturated double bond
(D) has the acid group linked on a main chain via a linking group of
which the main backbone is two or more atoms and the unsaturated double
bond on a side chain.

[0021]A second aspect of the invention provides a color filter having
colored patterns which is formed from the curable composition according
to the first aspect.

[0022]A third aspect of the invention provides a manufacturing method of a
color filter which includes: forming a colored film formed from the
curable composition by applying the curable composition for color filter
according to the first aspect onto a support; exposing the colored film
through a mask; and developing the exposed colored film to form colored
patterns.

BEST MODE FOR CARRYING OUT THE INVENTION

[0023]The curable composition for color filter of the invention has
extremely high sensitivity and excellent adhesiveness to a substrate. The
composition also exhibits high sensitivity even in the case where a
coloring material, which absorbs active energy ray, is included at high
concentration. Further, the composition exhibits excellent storage
stability and excellent precise dispersion stability in the case where
the coloring material used is a pigment, in addition to the excellent
developability for an unexposed area. Accordingly, a color filter
particularly for solid-state image pickup devices or LCDs, which has
excellent light exposure sensitivity, excellent adhesiveness to a
substrate of an exposed part, and desired pattern cross-sectional shape
and highly precise patterns can be formed. Further, a color filter with
no color irregularities or a color filter with high contrast can be
obtained due to excellent storage stability and precise dispersion
stability in the case where the coloring material used is a pigment.

[0024]Hereinafter, a curable composition for color filter, a color filter
formed from the curable composition, and a manufacturing method of the
color filter, of the invention, will be explained in detail.

[Curable Composition for Color Filter]

[0025]The curable composition of the invention is characterized by
including a polymerizable compound (A), a photopolymerization initiator
(B), a coloring agent (C), and a binder resin having an acid group and an
unsaturated double bond (D), where the binder resin (D) has a specific
structure.

[0026]Hereinbelow, each component included in the curable composition of
the invention will be explained one by one.

<Binder Resin Having an Acid Group and an Unsaturated Double Bond (D),
which has the Acid Group Linked on a Main Chain Via a Linking Group of
which the Main Backbone is Two or More Atoms and the Unsaturated Double
Bond on a Side Chain>

[0027]The curable composition of the invention includes a binder resin
having an unsaturated double bond and an acid group (hereinafter, simply
referred to as specific polymerizable binder).

[0028]Such specific polymerizable binder is preferably a copolymer which
includes a structural unit having an acid group (D-1) and a structural
unit having a double bond (D-2).

[0029]First, the structural unit having an acid group (D-1) will be
explained.

[0030]The `acid group` in the invention may be specifically mentioned by
--COOH, --SO3H, --PO3H2, --OSO3H, --OPO2H2,
or the like. Among these, --COOH, --SO3H, and --PO3H2 are
preferable, and --COOH is most preferable.

[0031]In the invention, the acid group is essentially linked to a main
chain via a linking group of which the main backbone is two or more
atoms.

[0032]Herein, the `main backbone of linking group` in the invention refers
to atoms or atomic groups used only for linking the main backbone with
the acid group, and especially when there are many linking pathways, it
refers to atoms or atomic groups constituting a pathway in which the
number of atoms to be used is minimum.

[0033]Hereinbelow, the number of atoms constituting the main backbone of
the linking group in the invention and a calculation method thereof will
be described. As shown in the formula below, numerical values accompanied
to atoms constituting the linking group refer to the number of atoms
constituting the linking group.

##STR00001##

[0034]The linking group which links the main chain with the acid group is
an organic group of n valence, where n represents a number of acid groups
to be shifted to pendant.

[0035]The linking group which links the main chain with the acid group is
not particularly limited as long as it is an organic group of n valence,
but is preferably an aryl group or an alkyl group having 2 to 60 carbon
atoms which optionally has, in the structure thereof, a partial structure
selected from the group consisting of an oxygen atom, a nitrogen atom, a
sulfur atom, a hydrocarbon ring structure having 3 to 20 carbon atoms, a
hetero ring, an ester bond, a sulfonate ester bond, a phosphate ester
bond, a urethane bond, a thiourethane bond, an amide bond, a urine bond,
and a thiourine bond; more preferably a linear or branched alkyl group
having 1 to 40 carbon atom(s) which optionally has, in the structure
thereof, a partial structure selected from the group consisting of an
oxygen atom, a nitrogen atom, a sulfur atom, a hydrocarbon ring structure
having 3 to 20 carbon atoms, an ester bond, a urethane bond, a
thiourethane bond, an amide bond, a urine bond, and a thiourine bond; and
further preferably a linear or branched alkyl group having 1 to 40 carbon
atom(s) which optionally has, in the structure thereof, a partial
structure selected from the group consisting of an oxygen atom, a
nitrogen atom, a hydrocarbon ring structure having 3 to 12 carbon atoms,
an ester bond, a urethane bond, and an amide bond.

[0036]The linking group may further have a substituent if possible. As the
introducible substituent, there are a linear, branched, or cyclic alkyl
group having 1 to 20 carbon atom(s), a chained, branched, or cyclic
alkenyl group having 2 to 20 carbon atoms, an alkynyl group having 2 to
20 carbon atoms, an aryl group having 6 to 20 carbon atoms, an acyloxy
group having 1 to 20 carbon atom(s), an alkoxycarbonyloxy group having 2
to 20 carbon atoms, an aryloxycarbonyloxy group having 7 to 20 carbon
atoms, a carbamoyloxy group having 1 to 20 carbon atom(s), a carbonamide
group having 1 to 20 carbon atom(s), a sulfonamide group having 1 to 20
carbon atom(s), a carbamoyl group having 1 to 20 carbon atoms(s), a
sulfamoyl group having 0 to 20 carbon atom(s), an alkoxy group having 1
to 20 carbon atom(s), an aryloxy group having 6 to 20 carbon atoms, an
aryloxycarbonyl group having 7 to 20 carbon atoms, an alkoxycarbonyl
group having 2 to 20 carbon atoms, an N-acylsulfamoyl group having 1 to
20 carbon atom(s), an N-sulfamoylcarbamoyl group having 1 to 20 carbon
atom(s), an alkylsulfonyl group having 1 to 20 carbon atom(s), an
arylsulfonyl group having 6 to 20 carbon atoms, an alkoxycarbonylamino
group having 2 to 20 carbon atoms, an aryloxycarbonylamino group having 7
to 20 carbon atoms, an amino group having 0 to 20 carbon atom(s), an
imino group having 1 to 20 carbon atom(s), an ammonio group having 3 to
20 carbon atoms, a hydroxy group, a mercapto group, an alkylsulfinyl
group having 1 to 20 carbon atom(s), an arylsulfinyl group having 6 to 20
carbon atoms, an alkylthio group having 1 to 20 carbon atom(s), an
arylthio group having 6 to 20 carbon atoms, a ureido group having 1 to 20
carbon atom(s), a heterocyclic group having 2 to 20 carbon atoms, an acyl
group having 1 to 20 carbon atom(s), a sulfamoylamino group having 0 to 2
carbon atom(s), a silyl group having 2 to 20 carbon atoms, an isocyanate
group, an isocyanide group, a halogen atom (for example, a fluorine atom,
a chlorine atom, a bromine atom, etc.), a cyano group, a nitro group, an
onium group, a group having an ethylenically unsaturated double bond, and
the like. Among these groups, preferred is a chained, branched, or cyclic
alkyl group having 1 to 10 carbon atom(s) from the viewpoint of easy
material availability. In addition, preferred are a hydroxy group, a
mercapto group, and a group having an ethylenically unsaturated double
bond from the viewpoints of sensitivity and developability. Most
preferred is a hydroxy group from the viewpoint of balance in sensitivity
and developability.

[0037]In the linking group of n valence, n is preferably from 1 to 5, but
n is preferably 1 from the viewpoint of strength of coated film to be
formed.

[0038]Specific examples of the repeating units including acid groups which
are included in the specific polymerizable binder of the invention will
be represented, but the invention is not limited to those. Hereinbelow,
those having --COOH as the acid group will be only exemplified, but
--COOH included as the acid group may be replaced by other acid group
such as --SO3H, --PO3H2, --OSO3H, --OPO2H2,
or the like. The acid group is preferably --COOH, --SO3H, or
--PO3H2, and most preferably --COOH.

[0039]The repeating unit including acid group (D-1) may be included either
singly or in combination of two or more kinds in the specific
polymerizable binder (D). The specific polymerizable binder for the
invention is a copolymer which includes at least the repeating unit
including acid groups and a structural unit having an unsaturated double
bond which will be described later. The total amount of the repeating
unit including acid groups is appropriately determined in accordance with
the structure thereof, design of colored film formed from the curable
composition, or the like, but it is in the range of preferably 1 to 80
mol %, more preferably 5 to 60 mol %, and further preferably 10 to 40 mol
%, relative to a total molar amount of polymer components.

[0041]The ethylenically unsaturated double bonds, introduced by a product
of dehydration/condensation reaction of monofunctional or polyfunctional
carboxylic acid, or addition reaction of monofunctional or polyfunctional
isocyanates or epoxys, with amides or unsaturated carboxylate ester
having a nucleophilic substituent such as a hydroxyl group, an amino
group, or a mercapto group, may also be exemplified. In addition, the
ethylenically unsaturated double bonds, introduced by a product of
addition reaction of amides or unsaturated carboxylate ester having an
electrophilic substituent such as isocyanate group or an epoxy group with
monofunctional or polyfunctional alcohols, amines, or thiols, and further
substitution reaction of amides or unsaturated carboxylate esters having
releasing group as a substituent such as a halogen group or a tosyloxy
group with monofunctional or polyfunctional alcohols, amines, or thiols,
may also be exemplified. In addition, the above unsaturated carboxylic
acid can be replaced by unsaturated phosphonic acid, styrene, vinyl
ether, or the like. The ethylenically unsaturated double bond is
preferably exemplified by ethylenically unsaturated double bond
introduced by (meth)acryl group or a vinyl ether group, from the
viewpoints of sensitivity and ease of synthesis.

[0042]As described above, such unsaturated double bond is preferably
included as the structural unit having an unsaturated double bond on a
side chain (D-2).

[0043]The resin including such unsaturated double bond is more preferably
a resin obtained by a reaction between a resin containing a carboxyl
group as an acid group, and a glycidyl group-containing unsaturated
compound such as glycidyl(meth)acrylate or allyl glycidyl ether; a resin
obtained by a reaction between a resin in which a hydroxyl
group-containing, (meth)acrylate ester-based compound is polymerized, and
(meth)acrylate ester having a free isocyanate group such as ethyl
(meth)acrylic acid-2-isocyanate; a resin including structural unit(s)
represented by any of Formula (1) to (3) which will be described below; a
resin obtained by synthesizing a resin having a specific functional group
which provides an unsaturated group according to a releasing reaction by
a base treatment and thereafter producing an unsaturated group by
subjecting the resin to a base treatment; or the like.

[0044]The specific polymerizable binder in the invention preferably has at
least one structural unit selected from the structural units represented
by the following Formulas (1) to (3) as the unsaturated double bond
moiety (D-2).

##STR00009##

[0045]In the Formulas (1) to (3), A1, A2, and A3 are each
independently an oxygen atom, a sulfur atom, or --N(R21)-- while
R21 is an optionally substituted alkyl group; G1, G2, and
G3 are each independently a divalent organic group; X and Z are each
independently an oxygen atom, a sulfur atom, or --N(R22)-- while
R22 is an optionally substituted alkyl group; Y is an oxygen atom, a
sulfur atom, an optionally substituted phenylene group, or
--N(R23)-- while R23 is an optionally substituted alkyl group;
and R1 to R20 are each independently a monovalent organic
group.

[0046]The structural unit having an unsaturated double bond (D-2) is
described in detail, for example, in JP-A No. 2003-262958, JP-A No.
2003-335814, etc., as the structural component of a binder used for
negative working image forming materials, and this structural unit can be
also applied to the invention.

[0047]The macromolecule employing the structural unit used in synthesizing
the specific polymerizable binder (D) of the invention can be produced by
the synthesis method (a) represented below.

[0048]Synthesis Method (a):

[0049]a method which includes copolymerizing at least one radically
polymerizable compound represented by the following Formula (4-1) with at
least one other radically polymerizable compound by a usual radical
polymerization process to synthesize a desired polymer precursor, and
then removing a proton using a base treatment thereby eliminating L, so
as to obtain a desired polymer having the structure represented by the
Formula (1).

[0050]Hereat, for the production of the polymer precursor, a commonly used
method such as suspension polymerization process or solution
polymerization process can be applied. The constitution of the copolymer
thereof may be any of a block copolymer, a random copolymer, a graft
copolymer, and the like.

##STR00010##

[0051]In the Formula (4-1), L is an anionic releasing group, preferably is
a halogen atom, a sulfonate ester, or the like; and for R3 to
R6, A1, G1, and X, same examples as mentioned in the
Formula (1) can be employed.

[0052]The base group used to cause a releasing reaction may be any of an
inorganic compound and an organic compound. The inorganic compound base
may be preferably exemplified by sodium hydroxide, potassium hydroxide,
sodium carbonate, sodium hydrocarbonate, potassium carbonate, potassium
hydrogencarbonate, or the like, and the organic compound base may be
preferably exemplified by metal alkoxide such as sodium methoxide, sodium
ethoxide, or potassium-t-butoxide, organic amine compound such as
triethylamine, pyridine, diisopropylethylamine, or the like.

[0053]The radically polymerizable compound represented by the Formula
(4-1) can be exemplified by the following compounds (M-1) to (M-12), but
it is not limited to these.

##STR00011##

[0054]These radically polymerizable compounds are easily available on the
market or by the synthesis method disclosed in the specification of JP-A
No. 2002-062648.

[0055]As the other synthesis method to obtain a structural unit having an
unsaturated double bond constituting the specific polymerizable binder
related to the invention, (b) a method which includes allowing a
releasing reaction in a specific functional group subjecting a polymer
including a compound represented by the following Formula (4-2) as the
copolymer component to a base treatment for a releasing reaction to take
place in a specific functional group, removing X1 and Z1 in the
formula, and forming a radically reactable group, so as to obtain a
polymer having the structure represented by the Formula (1), can be
mentioned.

##STR00012##

[0056]In the Formula (4-2), R1, R2, and R3 are each
independently hydrogen or a monovalent organic group; A2 is an
oxygen atom, a sulfur atom, or --NR8--; G1 is an organic
linking group; R8 is hydrogen or a monovalent organic group; n is an
integer of 1 to 10; R4 to R6, A1, and G1 have the
same meanings as defined in the Formula (1); and X1 is a releasing
group which can be removed by the releasing reaction.

[0057]Herein, X1 is a releasing group which can be removed by the
releasing reaction, and X1 is preferably the group anionically
charged for removal (which can be removed anionically).

[0060]The content of the structural unit having double bonds on a side
chain varies depending on the use, but for example, when the specific
polymerizable binder related to the invention is used for forming colored
patterns of a color filter containing a coloring agent at high
concentration, the content is at least preferably 5 mol % or greater, and
more preferably from 30 to 80 mol %.

[0061]In the case of synthesizing the specific polymerizable binder of the
invention by the aforementioned synthesis method (a) or (b), the
structural unit having an acid group and the structural unit having a
double bond may be copolymerized with other common radically
polymerizable compound, which is also a preferred embodiment.

[0062]The common radically polymerizable compound to be copolymerized can
be exemplified by the compounds (1) to (12) shown below.

[0074](12) methacrylate-based monomer in which a hetero atom is bonded to
α-position thereof. For example, compounds described in JP-A No.
2002-309057, JP-A No. 2002-311569, and the like.

[0075]As the preferred specific polymerizable binder for the invention,
specifically, polymers obtained by copolymerizing 1 to 70 mol % of at
least one structural unit selected from the structural units shown below
as the structural unit having an acid group (D-1), 5 to 80 mol % of the
exemplified structural unit (M-1) or (1-1) shown above as the structural
unit having an unsaturated double bond on a side chain (D-2), and 1 to 60
mol % of methyl (meth)acrylic acid, benzyl (meth)acrylic acid, or styrene
as the other radically polymerizable group used in combination if
necessary, can be mentioned.

##STR00020## ##STR00021## ##STR00022## ##STR00023##

[0076]The molecular weight of the specific polymerizable binder related to
the invention is in the range of preferably from 1,000 to 200,000, more
preferably from 2,000 to 100,000, even more preferably from 3,000 to
50,000, and most preferably from 5,000 to 30,000, in weight-average
molecular weight. Herein, for the weight-average molecular weight for the
invention, values measured by Gel Permeation Chromatography (GPC) using
polystyrene as the standard are employed.

[0077]Specific examples of the specific polymerizable binder of the
invention including the structural unit having an acid group (D-1) and
the structural unit having a double bond (D-2) are represented below as
[Exemplified Compounds (1) to (17)] each with weight-average molecular
weight (Mw) thereof, but the invention is not limited to these.

##STR00024## ##STR00025## ##STR00026## ##STR00027##

[0078]The content of the specific polymerizable binder is in the range of
preferably to 80 mass %, more preferably 0.05 to 60 mass %, even more
preferably 0.1 to 40 mass %, and most preferably 0.3 to 20 mass %,
relative to a total solid content in the curable composition for color
filter of the invention.

<Polymerizable Compound (A)>

[0079]For the curable composition of the invention, since the specific
polymerizable binder (D) is included, this may be served as a
polymerizable compound to serve the curability. However, from the
viewpoint of improving the film property for cured coated film or forming
the composition without a solvent, it is preferable that the
polymerizable compound (A) including an ethylenically unsaturated double
bond is also included in addition to the specific polymerizable binder.

[0080]The polymerizable compound which can be employed in the invention is
an addition polymerizable compound having at least one ethylenically
unsaturated double bond, which can be selected from compounds having at
least one terminal ethylenically-unsaturated double bond, preferably
compounds having two or more terminal ethylenically-unsaturated double
bonds. Such compounds are widely known in the field of industry, and
these may be employed in the invention without particular limitation.
These compounds have chemical form of, for example, monomer, prepolymer,
that is dimer, trimer, and oligomer, or a mixture thereof, a copolymer
thereof, or the like. Examples of the monomer and the copolymer thereof
include unsaturated carboxylic acid (for example, acrylic acid,
methacrylic acid, itaconic acid, crotonic acid, isocrotonic acid, maleic
acid, etc.), esters thereof, and amides thereof, and preferably include
ester of unsaturated carboxylic acid and polyvalent aliphatic alcohol
compound, and amides of unsaturated carboxylic acid and polyvalent
aliphatic amine compound. In addition, products of addition reaction of
monofunctional or polyfunctional isocyanates or epoxys, or
dehydration/condensation reaction of monofunctional or polyfunctional
carboxylic acid, with amides or unsaturated carboxylate ester having a
nucleophilic substituent such as a hydroxyl group, an amino group, or a
mercapto group, may also be preferably used. Further, products of
addition reaction of amides or unsaturated carboxylate ester having an
electrophilic substituent such as isocyanate group or an epoxy group with
monofunctional or polyfunctional alcohols, amines, or thiols, and further
substitution reaction of amides or unsaturated carboxylate esters having
releasing group as a substituent such as a halogen group or a tosyloxy
group with monofunctional or polyfunctional alcohols, amines, or thiols,
are also preferable. In addition to the exemplified compounds, compounds
having unsaturated phosphonic acid, styrene, vinyl ether, or the like,
instead of unsaturated carboxylic acid as in the above examples can also
be used.

[0083]As the itaconic acid ester, there are ethyleneglycol diitaconate,
propyleneglycol diitaconate, 1,3-butanediol diitaconate, 1,4-butanediol
diitaconate, tetramethyleneglycol diitaconate, pentaerythritol
diitaconate, sorbitol tetraitaconate, and the like. As the crotonic acid
ester, there are ethyleneglycol dicrotonate, tetramethyleneglycol
dicrotonate, pentaerythritol dicrotonate, sorbitol tetradicrotonate, and
the like. As the isocrotonic acid ester, there are ethyleneglycol
diisocrotonate, pentaerythritol diisocrotonate, sorbitol
tetraisocrotonate, and the like. As the maleic acid ester, there are
ethyleneglycol dimalate, triethyleneglycol dimalate, pentaerythritol
dimalate, sorbitol tetramalate, and the like.

[0084]As an example of other ester, for example, aliphatic alcohol-based
esters described in JP-B No. 51-47334, and JP-A No. 57-196231, esters
having an aromatic skeleton described in JP-A No. 59-5240, JP-A No.
59-5241, and JP-A No. 2-226149, and esters containing an amino group
described in JP-A No. 1-165613 are also preferably used. Further, the
aforementioned ester monomers may be also used as a mixture.

[0085]In addition, as a specific example of a monomer of amide of an
aliphatic polyhydric amine compound and unsaturated carboxylic acid,
there are methylenebis-acrylamide, methylenebis-methacrylamide,
1,6-hexamethylenebis-acrylamide, 1,6-hexamethylenebis-methacrylamide,
diethylenetriaminetrisacrylamide, xylylenebisacrylamide, and
xylylenebismethacrylamide. Examples of other preferable amide-based
monomer include monomers having a cyclohexylene structure described in
JP-B No. 54-21726.

[0086]In addition, urethane-based addition polymerizable compounds which
can be produced by the addition reaction of isocyanate and a hydroxyl
group are also preferable, and specific examples thereof include a vinyl
urethane compound having two or more polymerizable vinyl groups per
molecule, which is obtained by addition of vinyl monomer having a
hydroxyl group in the compound represented by the following Formula (A)
to a polyisocyanate compound having two or more isocyanate groups per
molecule, which is disclosed in JP-B No. 48-41708, and the like.

CH2═C(R10)COOCH2CH(R11)OH Formula (A)

(provided that, R10 and R11 are each H or CH3)

[0087]In addition, urethane acrylates described in JP-A No. 51-37193, JP-B
No. 2-32293, and JP-B No. 2-16765, and urethane compounds having an
ethylene oxide-based skeleton described in JP-B No. 58-49860, JP-B No.
56-17654, JP-B No. 62-39417, and JP-B No. 62-39418 are also preferable.
Furthermore, by using addition-polymerization compounds having an amino
structure or a sulfide structure in a molecule, described in JP-A No.
63-277653, JP-A No. 63-260909, and JP-A No. 1-105238, a
photopolymerizable composition, which is very excellent in a
photosensitive speed, can be obtained.

[0088]Other examples include polyfunctional acrylates and methacrylates
such as polyester acrylates, and epoxy acrylates obtained by reaction of
an epoxy resin and (meth)acrylic acid, described in each gazette of JP-A
No. 48-64183, JP-B No. 49-43191, and JP-B No. 52-30490. In addition,
examples include specified unsaturated compounds described in JP-B No.
46-43946, JP-B No. 1-40337, and JP-B No. 1-40336, and vinylphosphonic
acid-based compounds described in JP-A No. 2-25493. In some cases, a
structure containing a perfluoroalkyl group described in JP-A No.
61-22048 is preferably used. Furthermore, compounds which are introduced
as a photocurable monomer and oligomer in Journal of Adhesion Society of
Japan, vol. 20, No. 7, p. 300-308 (1984) can be also used.

[0089]In regard to these addition polymerizable compounds, detailed
description on the way of use such as a structure thereof, whether it is
used alone or in combination, or added amount, can be arbitrarily set
considering the design for performance of the curable composition. For
example, following viewpoints may be considered.

[0090]From the sensitivity point of view, a structure including a large
content of unsaturated group per molecular is preferable, in many cases,
those having two or more functional groups are preferable. In order to
improve the strength of image area, that is cured film, those having
three or more functional groups are preferable, and a method of adjusting
both the sensitivity and the strength by employing different number of
functional group•different polymerizable group (for example,
acrylate ester, methacrylate ester, styrene-based compound, vinyl
ether-based compound) in combination is also effective. From the
viewpoint of curing sensitivity, a compound having two or more
(meth)acrylate ester constitutions is preferably employed, a compound
having three or more (meth)acrylate ester constitutions is more
preferably employed, and a compound having four or more (meth)acrylate
ester constitutions is most preferably employed. From the viewpoints of
curing sensitivity and developability of unexposed area, it is preferable
to include an EO-modified substance. In addition, from the viewpoints of
curing sensitivity and strength of exposed part, it is preferable to
include a urethane bond.

[0091]The selection and method of use of the addition polymerizable
compound are also very important factors for compatibility with and
dispersibility in other components (for example, resin,
photopolymerization initiator, pigment) in the curable composition, and
for example, the compatibility may be improved by a use of low purity
compound or a combination use of two or more kinds. Also, in order to
improve the adhesiveness to a substrate or the like, a specific structure
may be selected.

[0094]The content of the polymerizable compound (A) in the solid content
of the curable composition for color filter of the invention is in the
range of preferably 1 to 50 mass %, more preferably 5 to 40 mass %, and
even more preferably 10 to 35 mass %.

[0095]The content ratio (mass ratio) of the specific polymerizable binder
(D) to the polymerizable compound (A), represented by (D)/(A), is in the
range of preferably 0.001 to 100, more preferably 0.005 to 50, and even
more preferably 0.01 to 10, from the viewpoints of sensitivity and
removability (developability) of an unexposed area.

<Photopolymerization Initiator (B)>

[0096]The curable composition of the invention includes the
photopolymerization initiator (B).

[0097]The photopolymerization initiator in the invention is a compound
which decomposed upon light addition, and initiates and promotes the
polymerization of the component (A) and the component (D) for the
invention which will be described later. The photopolymerization
initiator is preferably the one having an absorption band in the region
of 300 to 500 nm. The photopolymerization initiator may be used alone or
in combination of two or more kinds.

[0098]Examples of the photopolymerization initiator include an
organohalogenated compound, an oxydiazole compound, a carbonyl compound,
a ketal compound, a benzoin compound, an acridine compound, an
organoperoxide compound, an azo compound, a coumarin compound, an azide
compound, a metallocene compound, a hexaaryl-biimidazole compound, an
organoboron compound, a disulfonate compound, an oximeester compound, an
onium salt compound, an acylphosphine(oxide) compound, an alkylamino
compound, and the like.

[0102]As the oxydiazole compound, there are
2-trichloromethyl-5-styryl-1,3,4-oxodiazole,
2-trichloromethyl-5-(cyanostyryl)-1,3,4-oxodiazole,
2-trichloromethyl-5-(naphth-1-yl)-1,3,4-oxodiazole,
2-trichloromethyl-5-(4-styryl)styryl-1,3,4-oxodiazole, and the like.

[0108]As the azo compound, there are, for example, azo compounds described
in JP-A No. 8-108621, and the like.

[0109]As the coumarin compound, there are, for example,
3-methyl-5-amino-((s-triazin-2-yl)amino)-3-phenylcoumarin,
3-chloro-5-diethylamino-((s-triazin-2-yl)amino)-3-phenylcoumarin,
3-butyl-5-dimethylamino-((s-triazin-2-yl)amino)-3-phenylcoumarin, and the
like.

[0110]As the azide compound, there are organic azide compounds described
in specifications of U.S. Pat. Nos. 2,848,328, 2,852,379, and 2,940,853,
2,6-bis(4-azidebenzylidene)-4-ethylcyclohexanone (BAC-E), and the like.

[0112]As the hexaarylbiimidazole compound, there are, for example, various
compounds described in specifications of JP-B-6-29285, U.S. Pat. Nos.
3,479,185, 4,311,783, 4,622,286 and the like, specifically,
2,2'-bis(o-chlorophenyl)-4,4',5,5'-tetraphenylbiimidazole,
2,2'-bis(o-bromophenyl)-4,4',5,5'-tetraphenylbiimidazole,
2,2'-bis(o,p-dichlorophenyl)-4,4',5,5'-tetraphenylbiimidazole,
2,2'-bis(o-chlorophenyl)-4,4',5,5'-tetra(m-methoxyphenyl)biimidazole,
2,2'-bis(o,o'-dichlorophenyl)-4,4',5,5'-tetraphenylbiimidazole,
2,2'-bis(o-nitrophenyl)-4,4',5,5'-tetraphenylbiimidazole,
2,2'-bis(o-methylphenyl)-4,4',5,5'-tetraphenylbiimidazole,
2,2'-bis(o-trifluorophenyl)-4,4',5,5'-tetraphenylbiimidazole, and the
like.

[0116]As the onium salt compound, for example, there are diazonium salts
described in S. I. Schlesinger, Photogr. Sci. Eng., 18, 387 (1974), and
T. S. Bal et al, Polymer, 21, 423 (1980); ammonium salts described in the
specification of U.S. Pat. No. 4,069,055, and JP-A No. 4-365049;
phosphoniums salts described in specifications of U.S. Pat. Nos.
4,069,055 and 4,069,056; iodonium salts described in specifications of
E.P. No. 104,143 and U.S. Pat. Nos. 339,049, and 410,201, JP-A No.
2-150848, and JP-A No. 2-296514; and the like.

[0117]The iodonium salt which can be preferably used in the invention is a
diaryliodonium salt, which is preferably substituted with two or more
electron-donating groups such as an alkyl group, an alkoxy group, and an
aryloxy group from the viewpoint of stability. In addition, an iodonium
salt having a triarylsulfonium salt one of which the substituent has a
coumalin, anthraquinone structure, as the preferred form of sulfonium
salt, and having absorption band in the region of 300 nm or higher, is
preferable.

[0118]As the sulfonium salt which can be preferably used, there are
sulfoniums salts described in specifications of E.P. Nos. 370,693,
390,214, 233,567, 297,443, and 297,442, U.S. Pat. Nos. 4,933,377,
161,811, 410,201, 339,049, 4,760,013, 4,734,444, and 2,833,827, and
Germany Patent Nos. 2,904,626, 3,604,580, and 3,604,581, which may be
preferably substituted with an electron-withdrawing group from the
viewpoint of sensitivity to the stability. The electron-withdrawing group
preferably has the Hammett value greater than 0. The electron-withdrawing
group is preferably a halogen atom, a carboxylic acid, or the like.

[0119]As the preferable sulfonium salt in addition to those above, there
are sulfonium salts having a triarylsulfonium salt one of which the
substituent has a coumalin, anthraquinone structure and having an
absorption band in the region of 300 nm or higher. As another preferable
sulfonium salt, there are sulfonium salts whose triarylsulfonium salt has
an allyloxy group or arylthio group as its substitutent and having an
absorption band in the region of 300 nm or higher.

[0121]As the acylphosphine(oxide) compound, there are Irgacure 819,
Darocure 4265, and Darocure TPO, manufactured by CIBA Speciality
Chemicals, and the like.

[0122]As the alkylamino compound, for example, there are compounds having
a dialkylaminophenyl group and alkylamine compounds, described in
paragraph number [0047] of JP-A No. 9-281698, JP-A No. 6-19240, and JP-A
No. 6-19249, and the like. In specific, as the compound having a
dialkylaminophenyl group, there are compounds such as ethyl
p-dimethylaminobenzoate, and dialkylamino phenylcarbaldehyde such as
p-diethylamino benzcalbaldehyde and 9-julolidyl carbaldehyde; and as the
alkylamine compounds, there are triethanolamine, diethanolamine,
triethylamine, and the like.

[0123]The photopolymerization initiator (B) used in the invention is a
compound selected from the group consisting of a triazine-based compound,
an alkylamino compound, a benzyldimethylketal compound, an
α-hydroxyketone compound, an α-aminoketone compound, an
acylphosphine-based compound, a phosphineoxide-based compound, a
metallocene compound, an oxime-based compound, a biimidazole-based
compound, an onium-based compound, a benzothiazole-based compound, a
benzophenone-based compound, an acetophenone-based compound, derivatives
thereof, a cyclopentadiene-benzene-iron complex and a salt thereof, a
halomethyloxadiazole compound, and a 3-aryl-substituted-coumarine
compound, from the viewpoint of exposure sensitivity.

[0124]The initiator (B) is more preferably a compound selected from the
group consisting of a triazine-based compound, an alkylamino compound, an
α-aminoketone compound, an acylphosphine-based compound, a
phosphineoxide-based compound, an oxime-based compound, a
biimidazole-based compound, an onium-based compound, a benzophenone-based
compound, and an acetophenone-based compound, and even more preferably at
least one compound selected from the group consisting of a triazine-based
compound, an alkylamino compound, an oxime-based compound, and a
biimidazole-based compound.

[0125]The content of the photopolymerization initiator (B) is in the range
of preferably 0.1 to 50 mass %, more preferably 0.5 to 30 mass %, and
particularly preferably 1 to 20 mass %, relative to a total solid content
of the curable composition of the invention. Within this range, excellent
sensitivity and pattern formability can be obtained.

<Coloring Agent (C)>

[0126]The curable composition of the invention includes the coloring agent
(C).

[0127]The coloring agent to be included in the curable composition of the
invention is not particularly limited, and traditionally well-known
various kinds of dyes and pigments can be used alone or in combination of
two or more kinds. The coloring agent is preferably a pigment from the
viewpoints of heat resistance, light stability, and durability.

[0128]As the pigment to be included in the curable composition of the
invention, any of traditionally well-known various inorganic pigments and
organic pigments can be used, which is preferable to have high
transmittance.

[0129]As the inorganic pigment, there are metallic compounds such as
metallic oxides, metallic complex salts, or the like, and specific
examples include metallic oxides such as iron, cobalt, aluminium,
cadmium, lead, copper, titanium, magnesium, chrom, zinc, and antimony,
and composite oxides of the metals mentioned.

[0131]For the invention, particularly the pigment having a basic N atom in
a structural formula thereof is preferably used. The pigment having a
basic N atom exhibits an excellent dispersibility in the composition of
the invention. The reason for this is not yet fully clarified, but it is
assumed to be influenced by a good compatibility between the
photosensitive polymerization component and the pigment.

[0132]As the pigment which can be preferably used in the invention, the
following pigments can be mentioned, but the invention is not limited to
those:

[0133]These organic pigments can be used alone, or by variously combining
them in order to enhance a color purity. Examples of the combination are
shown below. For example, an anthraquinone-based pigment, a
perylene-based pigment, or a diketopyrrolopyrrole-based pigment alone as
a red pigment, or a mixture of at least one kind of them, and a
disazo-based yellow pigment, an isoindoline-based yellow pigment, a
quinophthalone-based yellow pigment or a perylene-based red pigment can
be used. For example, the anthraquinone-based pigment includes C.I.
Pigment Red 177, the perylene-based pigment includes C.I. Pigment Red
155, and C.I. Pigment Red 224, and the diketopyrrolopyrrole-based pigment
includes C.I. Pigment Red 254. From a color reproductivity, a mixture
with C.I. Pigment Yellow 139 is preferable. A mass ratio between the red
pigment and the yellow pigment is preferably 100:5 to 100:50. When the
ratio is 100:4 or less, it is difficult to suppress light transmittance
of 400 nm to 500 nm, and a color purity cannot be enhanced in some cases.
In addition, when the ratio is 100:51 or more, a main wavelength becomes
towards a short wavelength, and a deviation from a NTSC goal hue becomes
great in some cases. Particularly, the mass ratio is optimally in a range
of 100:10 to 100:30. In the case of a combination of red pigments, the
ratio can be adjusted in conformity with a chromaticity.

[0134]As a green pigment, a halogenated phthalocyanine-based pigment may
be used alone or in combination with a disazo-based yellow pigment, a
quinophthalone-based yellow pigment, an azomethine-based yellow pigment,
or an isoindoline-based yellow pigment. Examples thereof may preferably
include C.I. pigment green 7, 36, 37, and mixtures with C.I. pigment
yellow 83, C.I. pigment yellow 138, C.I. pigment yellow 139, C.I. pigment
yellow 150, C.I. pigment yellow 180, or C.I. pigment yellow 185. The mass
ratio between the green pigment and the yellow pigment is preferably
100:5 to 100:150. Particularly, the mass ratio is optimally in the range
of 100:30 to 100:120.

[0135]As the blue pigment, a phthalocyanine-based pigment can be used
alone, or a mixture of this with a dioxazine-based purple pigment can be
used. For example, a mixture of C.I. Pigment Blue 15:6 and C.I. Pigment
Violet 23 is preferable. A mass ratio of the blue pigment and the purple
pigment is preferably 100:0 to 100:30, more preferably 100:10 or less.

[0136]In addition, as a pigment for a black matrix, carbon, titanium
carbon, iron oxide, and titanium oxide are used alone, or a mixture
thereof is used. A combination of carbon and titanium carbon is
preferable. A mass ratio of carbon and titanium carbon is preferably in a
range of 100:0 to 100:60.

[0137]In the case of use for a color filter, the primary particle diameter
of the pigment is preferably 100 nm or smaller from the viewpoints of
color irregularity and contrast, and is preferably 5 nm or more from the
viewpoint of dispersion stability. The primary particle diameter of the
pigment is more preferably from 5 to 75 nm, even more preferably from 5
to 55 nm, and particularly preferably from 5 to 35 nm.

[0138]The primary particle diameter of the pigment can be determined by a
well-known method such as an electron microscope.

[0139]Among these, as the preferable pigment, pigments of an anthraquinone
series, an azomethine series, a benzylidene series, a cyanine series, a
diketopyrrolo pyrrole series, and a phthalocyanine series can be used.

[0140]The invention is related to the curable composition for a color
filter, but it is preferable to include a dye which can be uniformly
dissolved in the composition as the coloring agent (C) from the viewpoint
of improving color irregularities and contrast in the colored patterns.

[0142]As a chemical structure, dyes of a pyrazoleazo series, an anilinoazo
series, a triphenylmethane series, an anthraquinone series, an
anthrapyridone series, a benzylidene series, an oxonol series, a
pyrazolotriazol series, a pyridoneazo series, a cyanine series, a
phenothiazine series, a pyrrolopyrazoleazomethine series, a xanthene
series, a phthalocyanine series, a benzopyran series, and an indigo
series can be used.

[0143]In addition, when after pattern light exposure of the curable
composition and curing of an exposed part, an unexposed part is removed
with water or alkali development to form a pattern, for example, when a
colored pattern of a resist or a color filter is formed, an acid dye
and/or a derivative thereof can be suitably used in some cases, from a
viewpoint of that a binder and a dye at a light-unirradiated part
resulting from development are completely removed.

[0144]In addition, a direct dye, a basic dye, a mordant dye, an acid
mordant dye, an azoic dye, a disperse dye, an oil soluble dye, a food dye
and/or a derivative thereof can be also used usefully.

[0145]The acidic dye is not particularly limited as long as it is a dye
having an acidic group such as sulfonic acid or carboxylic acid, but it
is selected considering all the characteristics required such as the
solubility to an organic solvent or developer, ability to form a salt
with a basic compound, absorbance, coaction with other component in the
composition, light stability, and heat resistance.

[0146]The following are examples of the acid dye, however the invention is
not restricted to them. Examples include:

[0150]In addition to the above dyes, acid dyes of an azo series, a
xanthene series, and a phthalocyanine series are also preferable, and
acid dyes such as C.I. Solvent Blue 44, 38; C.I. Solvent Orange 45;
Rhodamine B, and Rhodamine 110, and derivatives of these dyes are also
preferably used.

[0151]Among these, the coloring agent (C) is preferably a coloring agent
selected from a triallylmethane series, an anthraquinone series, an
azomethine series, a benzylidene series, an oxonol series, a cyanine
series, a phenothiazine series, a pyrrolopyrazoleazomethine series, a
xanthene series, a phthalocyanine series, a benzopyran series, an indigo
series, a pyrazoloazo series, an anilinoazo series, a pyrazolotriazolazo
series, a pyridoneazo series, and an anthrapyridone series.

[0152]The content of the coloring agent in the curable composition of the
invention is in the range of preferably 30 to 85 mass %, more preferably
40 to 80 mass %, and most preferably 50 to 75 mass %, when it is
considered to be used for forming colored patterns of a color filter.

<Other Component>

[Other Binder Resin]

[0153]The curable composition of the invention may include other binder
resin having no polymerizability (hereinbelow, simply referred to as
`binder polymer`) in addition to the specific polymerizable binder (D)
for the purpose of improving the coated film characteristics.

[0154]As the well-known binder polymer other than (D), linear organic
polymer can be preferably used. The well-known `linear organic polymer`
can be arbitrarily used. Preferably, a linear organic polymer which is
soluble or swellable in water or weak alkaline water can be selected to
allow the water development or weak alkaline water development. The
linear organic polymer is selected and used in accordance with its use as
a coated-film forming agent, as well as an agent allowing development
with water, weak alkaline water, or an organic solvent. For example, when
the water-soluble organic polymer is used, water development can be
carried out. Examples of such linear organic polymer include radical
polymers each having a carboxylic acid group on a side chain, such as a
resin obtained by homopolymerizing or copolymerizing monomers having a
carboxyl group; a resin obtained by homopolymerizing or copolymerizing
monomers having acid anhydride and then hydrolyzing or half esterifying
or half amidating the acid anhydride unit; and epoxyacrylate obtained by
modifying an epoxy resin with unsaturated monocarboxylic acid and acid
anhydride, as described in JP-A No. 59-44615, JP-B No. 54-34327, JP-B No.
58-12577, JP-B No. 54-25957, JP-A No. 54-92723, JP-A No. 59-53836, and
JP-A No. 59-71048. As the monomer having a carboxyl group, there are
acrylic acid, methacrylic acid, itaconic acid, crotonic acid, maleic
acid, fumaric acid, 4-carboxylstyrene, and the like. As the monomer
having acid anhydride, there is maleic anhydride or the like.

[0155]Further, there is an acidic cellulose derivative having a carboxylic
acid group on a side chain. In addition to these, adducts obtained by
addition of a cyclic acid anhydride to a polymer having a hydroxyl group
are also useful.

[0156]In the case of using the alkali-soluble resin as the copolymer, a
compound to be copolymerized may be any monomer other than those
mentioned above. Examples of other monomer include the following
compounds (1) to (12).

[0168](12) Methacrylate-based monomer in which a hetero atom is bonded to
α-position thereof. For example, compounds described in
specification of JP-A No. 2002-309057, specification of JP-A No.
2002-311569.

[0169]Among these, (meth)acryl resins having an allyl group or a vinyl
ester group and a carboxyl group on the side chain, alkali-soluble resins
having a double bond on the side chain described in JP-A No. 2000-187322
and JP-A No. 2002-62698, and alkali-soluble resins having an amide group
on the side chain described in JP-A No. 2001-242612, have excellent
balance in film strength, sensitivity, and developability, thus are
preferable.

[0170]In addition, urethane-based binder polymers having an acid group
described in JP-B No. 7-12004, JP-B No. 7-120041, JP-B No. 7-120042, JP-B
No. 8-12424, JP-A No. 63-287944, JP-A No. 63-287947, JP-A No. 1-271741,
and Japanese Patent Application No. 10-116232, and urethane-based binder
polymers having an acid group and a double bond on a side chain described
in JP-A No. 2002-107918 are very excellent in a strength and, therefore,
are advantageous in low light exposure suitability.

[0171]Acetal-modified polyvinyl alcohol-based binder polymers having an
acid group described in EP No. 993966, EP No. 1204000, and JP-A No.
2001-318463 are excellent in a balance between a film strength and
developability, being suitable.

[0172]Furthermore, as a water-soluble linear organic polymer,
polyvinylpyrrolidone and polyethylene oxide are useful. In addition, in
order to enhance a strength of a cured film, alcohol-soluble nylon, and
polyether of 2,2-bis-(4-hydroxyphenyl)-propane and epichlorohydrin are
also useful.

[0173]The weight-average molecular weight of other binder polymer is
preferably 5,000 or greater, and more preferably in the range of 10,000
to 300,000, and the number-average molecular weight is preferably 1,000
or greater, and more preferably in the range of 2,000 to 250,000. The
polydispersity (weight-average molecular weight/number-average molecular
weight) is preferably 1 or greater, and more preferably in the range of
1.1 to 10.

[0174]These resins may be any of random polymer, block polymer, and graft
polymer.

[0175]The binder polymer can be synthesized according to the traditionally
well-known method. The solvent to be used upon the synthesis can be
exemplified by tetrahydrofuran, ethylene dichloride, cyclohexanone,
methyl ethyl ketone, acetone, methanol, ethanol, ethylene glycol
monomethyl ether, ethylene glycol monoethyl ether, 2-methoxy ethyl
acetate, diethylene glycol dimethyl ether, 1-methoxy-2-propanol,
1-methoxy-2-propylacetate, N,N-dimethylformamide, N,N-dimethylacetamide,
toluene, ethyl acetate, methyl lactate, ethyl lactate, dimethyl
sulfoxide, water, or the like. These solvents may be used alone or in
combination of two or more kinds.

[0176]The radical polymerization initiator to be used upon the synthesis
of the binder polymer according to the invention can be exemplified by
well-known compounds such as azo-based initiator or peroxide initiator.

[0177]The content of the other binder polymer is in the range of
preferably 5 to 60 mass %, more preferably 7 to 50 mass %, and most
preferably 10 to 40 mass %, relative to a total solid content of the
curable composition of the invention, from the viewpoint of balance in
pigment dispersion stability over the time and developability.

[0178]The curable composition of the invention may further include
optional components described below, if necessary.

[Dispersing Agent]

[0179]In the case of including the pigment in the curable composition of
the invention as the coloring agent (C), a dispersing agent is preferably
added from the viewpoint of improving the dispersibility of the pigment.

[0181]The macromolecular dispersing agent can be further classified into a
linear polymer, a terminal-modified polymer, a graft-type polymer, and a
block-type polymer, from the structure thereof.

[0182]The macromolecular dispersing agent adsorbs on a surface of the
pigment and acts to prevent a reaggregation. Thus, those having an anchor
site for a surface of the pigment, such as a terminal-modified polymer, a
graft-type polymer, and a block-type polymer can be exemplified as the
one having a preferable structure. The pigment derivative modifies the
pigment surface, thereby being effective in enhancing the adsorption of
the macromolecular dispersing agent.

[0184]These dispersing agents may be used alone or in combination of two
or more kinds. In the invention, it is particularly preferable to use the
pigment derivative and the macromolecular dispersing agent in
combination.

[0185]The content of the dispersing agent in the invention is in the range
of preferably 1 to 100 mass %, more preferably 3 to 100 mass %, and even
more preferably 5 to 80 mass %, relative to the pigment.

[0186]In specific, in the case of using the macromolecular dispersing
agent, its amount to be used is in the range of preferably 5 to 100 mass
% and more preferably 10 to 80 mass %, relative to the pigment.
Meanwhile, in the case of using the pigment derivative, its amount to be
used is in the range of preferably 1 to 30 mass %, more preferably 3 to
20 mass %, and particularly preferably 5 to 15 mass %, relative to the
pigment.

[0187]In the invention, in the case of using the pigment and the
dispersing agent, the total content of the pigment and the dispersing
agent is in the range of preferably 35 to 90 mass %, more preferably 45
to 85 mass %, and even more preferably 50 to 80 mass %, relative to a
total solid content constituting the curable composition, from the
viewpoints of curing sensitivity and color density.

[Sensitizer]

[0188]The curable composition for color filter of the invention preferably
includes a sensitizer for the purposes of improving the radical
generation efficiency of the polymerization initiator (B) and widening
the exposure wavelength. The sensitizer useful in the invention is
preferably a sensitizer sensitizing the photopolymerization initiator by
an electron-transfer mechanism or an energy-transfer mechanism.

[0189]The sensitizer useful in the invention can be mentioned by those
belonging to the following exemplified compounds and having an absorption
band in the region of 300 to 450 nm.

[0190]Preferable examples of the sensitizer include those belonging to the
following compounds and having an absorption band in the region of 330 to
450 nm.

[0192]As the more preferable example of the sensitizer, the compounds
represented by the following Formulas (i) to (iv) can be mentioned.

##STR00028##

[0193]In the Formula (i), A1 is a sulfur atom or NR50, while
R50 is an alkyl group or an aryl group; L2 is a non-metallic
atomic group which joins to adjacent A1 and adjacent carbon atom to
form a basic nucleus of the dye; R51 and R52 are each
independently a hydrogen atom or a monovalent non-metallic atomic group,
where R51 and R52 may be bonded to each other to form an acidic
nucleus of the dye; and W is an oxygen atom or a sulfur atom.

##STR00029##

[0194]In the Formula (ii), Ar1 and Ar2 are each independently an
aryl group, which are linked via a bond from -L3-, where L3 is
--O-- or --S--; and W has the same meaning as that in the Formula (i).

##STR00030##

[0195]In the Formula (iii), A2 is a sulfur atom or NR59; L4
is a non-metallic atomic group which joins to adjacent A and carbon atom
to form a basic nucleus of the dye; and R53, R54, R55,
R56, R57, and R58 are each independently a group of
monovalent atomic group; where R59 is an alkyl group or an aryl
group.

##STR00031##

[0196]In the Formula (iv), A3 and A4 are each independently
--S--, --NR62--, or NR63--, while R62 and R63 are
each independently a substituted or non-substituted alkyl group or a
substituted or non-substituted aryl group; L5 and L6 are each
independently a non-metallic atomic group which joins to adjacent A3
and A4, respectively and adjacent carbon atom, to form a basic
nucleus of the dye; R60 and R61 are each independently a
monovalent non-metallic atomic group or they may be bonded to each other
to form an aliphatic or aromatic ring.

[0197]Moreover, as the sensitizer preferably included in the curable
composition of the invention, at least one compound selected from the
compounds represented by the following Formulas (IV) to (VI) can be
mentioned in addition to those mentioned above. These may be used alone
or in combination of two or more kinds.

##STR00032##

[0198]In the Formulas (IV) and (V), R1 and R2 are each
independently a monovalent substituent; R3, R4, R5, and
R6 are each independently a hydrogen atom or a monovalent
substituent; and n is an integer of 0 to 5, and n' is an integer of 0 to
5, where n and n' are not 0 at the same time. When n is 2 or greater, a
plurality of R1s may be the same with or different from each other,
and when n' is 2 or greater, a plurality of R2s may be the same with
or different from each other.

[0199]The compound represented by the Formula (IV) is preferably a
compound represented by the following Formula (IV-1) from the viewpoints
of sensitivity, and colorability in the case of including the pigment.

##STR00033##

[0200]In the Formula (IV-1), R1 and R2 are each independently a
monovalent substituent; and n is an integer of 0 to 5, and n' is an
integer of 1 to 5. When n is 2 or greater, a plurality of R1s may be
the same with or different from each other, and when n' is 2 or greater,
a plurality of R2s may be the same with or different from each
other.

[0201]In the Formula (IV-1), the monovalent substituent represented by
R1 and R2 has the same meaning as the monovalent substituent in
the Formula (IV), and the preferable range is also the same.

[0202]For the compounds represented by the Formulas (IV) and (V), the
molar extinction coefficient ε at wavelength 365 nm is preferably
500 mol-1Lcm-1 or greater, more preferably 3,000
mol-1Lcm-1 or greater, and most preferably 20,000
mol-1Lcm-1 or greater. When the molar extinction coefficient
ε at each wavelength is in the above range, sensitivity improves
highly effectively from the viewpoint of light absorbance efficiency,
thus is preferable.

[0203]Herein, the molar extinction coefficient ε is obtained by
preparing a dye solution prepared at a 0.01 g/l concentration in a
1-metoxy-2-propanol to be used as a sample, measuring the transmission
spectrum of the sample at 365 nm, and then determining the absorbance
from the UV-visible absorption spectrum of the sample. The measurement
device used is Cary 5G UV-Vis-MR Spectrophotometer spectroscopy
altimeter, manufactured by Varian Corp.

[0204]Specific examples of the preferable compound represented by the
Formula (IV) or (V) will be shown below, but the invention is not limited
to these.

[0205]In the present specification, there may be a case where the chemical
formula is shown as a simplified structural formula, and particularly the
solid line or the like with no element or substituent indicates a
hydrocarbon group. In the following specific examples, Me represents a
methyl group, Et represents an ethyl group, Bu represents a butyl group,
n-Bu represents an n-butyl group, and Ph represents a phenyl group.

[0206]In the Formula (VI), A is an optionally substituted aromatic ring or
hetero ring; X is an oxygen atom, a sulfur atom, or --N(R3)--; Y is
an oxygen atom, a sulfur atom, or --N(R3)--; and R1, R2,
and R3 are each independently a hydrogen atom or a monovalent
non-metallic atomic group, while A, R1, R2, and R3 may be
bonded to each other to form an aliphatic or aromatic ring.

[0207]In the Formula (VI), R1, R2, and R3 are each
independently a hydrogen atom or a monovalent non-metallic atomic group.
When R1, R2, and R3 are each a monomavelent non-metallic
atom, they are preferably a substituted or non-substituted alkyl group, a
substituted or non-substituted aryl group, a substituted or
non-substituted alkenyl group, a substituted or non-substituted aromatic
hetrocyclic residue, a substituted or non-substituted alkoxy group, a
substituted or non-substituted alkylthio group, a hydroxyl group, or a
halogen atom.

[0208]In the compound represented by the Formula (VI), Y is preferably an
oxygen atom or --N(R3)-- from the viewpoint of improving the
resolution efficiency of the photopolymerization initiator. R3 is a
hydrogen atom or a monovalent non-metallic atomic group. Further Y is
most preferably --N(R3)--.

[0209]Hereinbelow, specific examples (VI1) to (VI124) of the preferable
compound represented by the Formula (VI) will be shown, but the invention
is not limited to these. The isomer due to a double bond linking the
acidic nucleus and the basic nucleus is not clarified, and the invention
is not limited to any isomer.

[0210]With respect to the compound represented by the Formula (VI) related
to the invention, various chemical modifications can be subjected in
order to improve the characteristics of the curable composition.

[0211]For example, the sensitizing dye and an addition-polymerizable
compound structure (for example, acryloyl group or methacryloyl group)
may be linked by a covalent bond, an ionic bond, a hydrogen bond, or the
like, thereby strengthening the exposed film and preventing unnecessary
precipitation of the sensitizing dye from the film after the exposure.

[0212]In addition, by linking the sensitizing dye and a part of the
structure capable of generating radical in the photopolymerization
initiator described above (for example, reduction degradable moiety such
as halogenated alkyl, onium, peroxide, or biimidazole, or oxidation
cleavable moiety such as borate, amine, trimethylsilylmethyl,
carboxymethyl, carbonyl, or imine), the sensitivity particularly in a
low-density initiation-system can be significantly increased.

[0213]In the curable composition of the invention, the compound
represented by any of the Formulas (IV) to (VI) may be either employed
alone or in combination of two or more kinds.

[0214]The compound represented by any of the above Formulas (IV) to (VI)
shows the significant effect when it is added in the case where the
pigment density in the curable composition is extremely high and the
light transmittance of the colored patterns to be formed (photosensitive
layer) is extremely low, specifically in the case where the light
transmittance at 365 nm of the photosensitive layer formed without adding
the sensitizing dye is 10% or lower. Among the compounds represented by
the Formula (IV) to (VI) above, the compound represented by the Formula
(VI) is most preferable, and specifically the compounds (VI56) to (VI122)
are most preferable.

[0215]The sensitizer may be either used alone or in combination of two or
more kinds.

[0216]The content of the sensitizer in the curable composition of the
invention is in the range of preferably 0.1 to 20 mass % and more
preferably 0.5 to 15 mass %, relative to a total solid content of the
curable composition, from the viewpoints of the light absorbance
efficiency in a deep area and the initial decomposition efficiency.

[Cosensitizing Agent]

[0217]It is also preferable that the curable composition of the invention
includes a cosensitizing agent. In the invention, the cosensitizing agent
has an effect on further improving the sensitivity of the sensitizing
agent or initiator to active radiation, or preventing the inhibition of
polymerization of the polymerizable compound due to oxygen.

[0221]The content of the cosensitizing agent is in the range of preferably
0.1 to 30 mass %, more preferably 0.5 to 25 mass %, and even more
preferably 1.0 to 20 mass %, relative to a mass of total solid content of
the curable composition, from the viewpoint of improving the curing rate
according to the balance between polymerization growing rate and chain
transfer.

[Polymerization Inhibitor]

[0222]In the invention, a small amount of heat polymerization inhibitor is
desirably added to inhibit the undesired heat polymerization of the
compound having a polymerizable ethylenically unsaturated double bond
upon production or preservation of the curable composition.

[0224]An addition amount of the heat polymerization inhibitor is
preferably about 0.01% by mass to about 5% by mass relative to a mass of
a total composition. If desired, in order to prevent polymerization
inhibition with oxygen, a higher fatty acid derivative such as behenic
acid and behenic acid amide may be added, to be unevenly distributed on a
surface of a photosensitive layer during a drying process after coating.
An addition amount of the higher fatty acid derivative is preferably
about 0.5% by mass to about 10% by mass of a total composition.

[Other Additives]

[0225]Further, in the invention, a plasticizer or an inorganic filler to
improve the properties of the cured coated film, well-known additives
such as a sensitizing agent for improving the ink receptivity of a
surface of the photosensitive layer, or a substrate adhesive agent for
improving the substrate adhesion, may be also included.

[0226]Examples of the plasticizer include dioctylphthalate,
didodecylphthalate, triethylene glycol dicaprylate, dimethyl glycol
phthalate, tricresyl phosphate, dioctyl adipate, dibutyl sebacate,
triacetylglycerol, and the like. In the case of employing a binder, the
plasticizer can be added by 10 mass % or less relative to a total mass of
the compound having ethylenically unsaturated double bond and the binder.

[0227]In the case of applying the curable composition of the invention to
a hard material surface such as a substrate, an additive for improving
the adhesiveness to the hard material surface (hereinafter, referred to
as `substrate adhesive agent`) may be also added.

[0232]As the aluminum-based coupling agent, there are, for example,
acetoalkoxyaluminum diisopropylate, and the like.

[0233]The content of the substrate adhesive agent is in the range of
preferably 0.1 to 30 mass %, more preferably 0.5 to 20 mass %, and
particularly preferably 1 to 10 mass %, relative to a total solid content
of the curable composition of the invention, from the viewpoint of
preventing a residue to be remained on an unexposed area of the curable
composition.

[0234]The curable composition of the invention cures with high
sensitivity, as well as is excellent in storage stability. In addition,
the curable composition is particularly useful in forming colored
patterns of a color filter since high adhesiveness to a surface of the
hard material such as a substrate to which the curable composition is
applied is exhibited.

<Color Filter and Manufacturing Method of the Same>

[0235]Then, the color filter of the invention, and a process for
manufacturing the same will be explained.

[0236]The color filter of the invention is characterized in that it has a
colored pattern using the curable composition of the invention on a
support.

[0237]Then, the color filter of the invention will be described in detail
by referring to a process for manufacturing the same (process for
manufacturing the color filter of the invention).

[0238]The invention is characterized by comprising steps of forming a
colored film formed from the curable composition by applying the curable
composition of the invention onto a support; exposing the colored film
through a mask; and developing the exposed colored film to form colored
patterns.

[0239]Hereinbelow, each step in the manufacturing method of the invention
will be explained.

<Colored Film Forming Step>

[0240]In the step of forming a colored film, the curable composition of
the invention is applied onto a support to form a colored film formed
from the curable composition.

[0241]Examples of the support which can be used in the present step
include a soda glass, a Pyrex (registered trademark) glass, a quartz
glass and those glasses with a transparent conduction film attached
thereto which are used in a liquid crystal display element, a
photoelectric conversion element substrate used in an image pickup
element, for example, a silicon substrate, and a complementary metal
oxide film semiconductor (CMOS). On these substrates, a black stripe,
which isolates each pixel, is formed in some cases.

[0242]If necessary, on these supports, an undercoating layer may be set
for improving adhesion with an upper layer, preventing diffusion of a
substance, and flattening a substrate surface.

[0243]As the method of applying the curable composition of the invention
onto a support, there are various application methods to be employed such
as slit coating, inkjet process, turnover coating, flow casting coating,
coating with a roller, screen printing, and the like.

[0244]The film thickness just after the application of the curable
composition of the invention is in the range of preferably 0.1 to 10
μm, more preferably 0.2 to 5 μm, and even more preferably 0.2 to 3
μm, from the viewpoints of giving a uniform film thickness for the
coated film and easily drying a coating solvent.

[0245]Drying (pre-baking) of the colored film (curable composition film)
coated on a substrate can be carried out in a hot plate, an oven, or the
like, at a temperature between 50 and 140° C. for 10 to 300
seconds.

[0246]The coated film thickness of the curable composition after being
dried (hereinafter, referred to as `dry film thickness`), in the case of
being employed for a color filter for LCD, is in the range of preferably
0.1 to less than 2.0 μm, more preferably 0.2 to 1.8 μm, and
particularly preferably 0.3 to 1.75 μm, from the viewpoints of
capability to be formed into flat LCD and insuring the color density.

[0247]In the case of being employed for a color filter for IS, the
thickness is in the range of preferably 0.05 to less than 1.0 μm, more
preferably 0.1 to 0.8 μm, and particularly preferably 0.2 to 0.7
μm, from the viewpoints of attaining color density and reducing
problems such as diagonal light is not reaching a light-receiving area or
concentration difference of light between the end and the center of a
device becomes significant.

<Exposing Step>

[0248]In the exposing step, the colored film (curable composition film)
formed in the above-mentioned colored film-forming step is exposed
through a mask having a predetermined mask pattern.

[0249]For the exposure in the present step, the pattern exposure of the
coated film can be carried out by exposing through a predetermined mask
pattern, curing only an irradiated area of the coated film, developing
with a developer, and thereby forming a pattern coated film comprising
pixels of each color (3 or 4 colors). As the radiation which can be used
in exposure, particularly, UV ray radiation such as g-ray, i-ray, or the
like, is preferable. The dose of irradiation is in the range of
preferably 5 to 1,500 mJ/cm2, more preferably 10 to 1,000

mJ/cm2, and most preferably 10 to 500 mJ/cm2.

[0250]When the color filter of the invention is for a liquid crystal
display device, the irradiation dose is in the range of preferably 5 to
200 mJ/cm2, more preferably 10 to 150 mJ/cm2, and most
preferably 10 to 100 mJ/cm2. When the color filter of the invention
is for a solid-state image pickup device, the irradiation dose is in the
range of preferably 30 to 1,500 mJ/cm2, more preferably 50 to 1,000
mJ/cm2, and most preferably 80 to 500 mJ/cm2.

<Developing Step>

[0251]When an alkali developing treatment (developing step) is
subsequently carried out, a light unirradiated part by the exposure is
eluted with an aqueous alkali solution to leave only the light cured
part. The developer is desirably an organic alkali developer not causing
damage on a circuit of the substrate or the like. The developing
temperature is usually from 20 to 30° C., and the developing time
is usually from 20 to 90 seconds.

[0252]Examples of the alkali agent useful in the developer include organic
alkali compounds such as aqueous ammonia, ethylamine, diethylamine,
dimethylethanolamine, tetramethylammonium hydroxide, tetraethylammonium
hydroxide, choline, pyrrole, piperidine, and
1,8-diazabicyclo-[5,4,0]-7-undecene, and these alkali agents diluted with
pure water such that the alkali agent concentration is in the range of
0.001 to 10 mass %, preferably 0.01 to 1 mass %, thereby giving an
aqueous alkali solution, can be used preferably as a developer. When such
aqueous alkali solution is used as a developer, the colored pattern is
usually washed with water (rinsed).

[0253]Subsequently, a surplus developer is washed out, and the washed film
is dried.

[0254]In the manufacturing method of the invention, curing step which
includes curing by heating (post-baking) and/or exposing the formed
colored patterns may be also subjected, if necessary, after carrying out
the aforementioned colored-layer forming step, exposing step, and
developing step.

[0255]Post-baking is heat treatment after development for completing
curing, and heat curing treatment at 100° C. to 240° C. is
usually performed. When a substrate is a glass substrate or a silicon
substrate, 200° C. to 240° C. is preferable in the above
temperature range.

[0256]This post-baking treatment can be performed continuously or in a
batch manner using a heating means such as a hot plate, a convection oven
(hot air circulating dryer), and a high frequency heating machine so that
the coated film after development is placed under the above condition.

[0257]A color filter having desired hues can be prepared by repeating the
above-described steps of colored-film forming step, exposing step, and
developing process (further, curing step when necessary) only a number of
times corresponding to the number of desired hues.

[0258]For the application of the curable composition of the invention,
only the application to pixels for a color filter is mainly mentioned,
but there is no doubt that the curable composition is also applicable to
a black matrix provided between pixels of a color filter. The black
matrix can be formed in the same manner to the method of preparing
pixels, such as by enhancing curing of a film by subjecting pattern
exposure, alkali development, and then post baking, except in the case
where a black pigment such as carbon black or titanium black added agent
is employed in the curable composition of the invention as the coloring
agent.

[0259]Since the color filter of the invention employs the curable
composition of the invention, the formed colored patterns exhibit a high
adhesiveness to a support substrate, and since the cured composition is
excellent in developability, excellent exposure sensitivity and
adhesiveness to a substrate of an exposed part are exhibited, thereby
forming a high resolution pattern providing a desired cross-sectional
shape. Accordingly, the invention is suitable for liquid crystal displays
and solid-state image pickup devices such as CCD, particularly suitable
for a high resolution CCD device, CMOS, or the like having 1,000,000
pixels or more. The color filter of the invention may be used as, for
example, a color filter disposed between the light-receiving part of
pixels constituting the CCD and micro-lenses for converging the light.

EXAMPLES

[0260]Hereinbelow, the invention will be described in more detail with
reference to Examples, but the invention is not limited by these.

Synthesis Example of Compound Having Specific Functional Group

Synthesis of Compound (i-1)

[0261]To a 500 ml three-necked flask charged with 58.6 g of
2-hydroxyethylmethacrylate, 250 ml of acetone was added, and the mixture
was stirred. Thereto, 39.2 g of pyridine and 0.1 g of p-methoxyphenol
were added, and then cooled in an ice bath filled with ice water. When
the mixed solution reached 5° C. or below, 114.9 g of bromide
2-bromoisobutane was added dropwisely through dripping funnel over 3
hours. After the dropwise addition, the ice bath was removed and the
mixed solution was further stirred for 3 hours. The reaction mixture was
poured into 750 ml of water, and stirred for 1 hour. The water-mixed
solution was extracted three times with 500 ml of ethyl acetate using a
separating funnel. The organic layer was washed with 500 ml of 1M
hydrochloric acid, 500 ml of a saturated aqueous solution of sodium
bicarbonate, and 500 ml of saturated brine, in the said order. To the
organic layer, 100 g of magnesium sulfate was added for dehydration, and
then the dried resultant was filtered. The solvent was distilled off
under reduced pressure to obtain 120.3 g of a residue. The obtained
residue was Compound (i-1) which was confirmed by 1H-NMR, IR, and
mass spectrometry spectrum. The purity obtained by HPLC was 95%.

Synthesis of Compound (i-6)

[0262]To a 1,000 ml three-necked flask, 174.2 g of
diethyleneglycolmethacrylate, 138.0 g of potassium carbonate, 0.1 g of
p-methoxyphenol, and 400 ml of acetone were charged, and the mixture was
cooled in an ice bath filled with ice water. When the solution
temperature reached 5° C. or below, 229.9 g of bromide
2-bromoisobutane was added dropwisely through dripping funnel over 1.5
hours. After the dropwise addition, the ice bath was removed and the
mixed solution was further stirred for 3 hours. The reaction mixture was
poured into 800 ml of water, and stirred for 1 hour. The water-mixed
solution was extracted three times with 500 ml of ethyl acetate using a
separating funnel. The organic layer was washed with 500 ml of 1M
hydrochloric acid, 500 ml of a saturated aqueous solution of sodium
bicarbonate, and 500 ml of saturated brine, in the said order. To the
organic layer, 100 g of magnesium sulfate was added for dehydration, and
then the dried resultant was filtered. The solvent was distilled off
under reduced pressure to obtain 300.1 g of a residue. The obtained
residue was Compound (i-6) which was confirmed by 1H-NMR, IR, and
mass spectrometry spectrum.

Synthesis Example 1

(1) Synthesis of Resin (I)

Specific Polymerizable Binder

[0263]To a 1,000 ml three-necked flask, 86 g of 1-methyl-2-pyrrolidone was
charged, and heated to 90° C. under nitrogen flow. 86 g of
1-methyl-2-pyrrolidone solution containing 50 g of Compound (i-1), 35 g
of Light Ester HO-MS (manufactured by Kyoeisha Chemical Co., Ltd.), 31 g
of benzyl methacrylate, and 3.2 g of V-601 (manufactured by Wako Pure
Chemical Industries, Ltd.) was added dropwisely over 2 hours. After the
dropwise addition, the mixed solution was further stirred for 2 hours.
The reaction solution was cooled to room temperature and then poured into
7 L of water to precipitate a polymer. The precipitated polymer was
filtered, washed with water, and dried to obtain 110 g of polymer. The
weight-average molecular weight of the obtained polymer was measured by
Gel Permeation Chromatography (GPC) using polystyrene as a standard
material, and the result obtained was 14,000. The acid value obtained by
titration was 1.25 meq/g (calculated value: 1.31 meq/g), confirming that
the polymerization was normally performed. To a 1,000 ml three-necked
flask, 110 g of the obtained polymer and 0.1 g of p-methoxyphenol were
charged, and 170 g of 1-methyl-2-pyrrolidone was cooled in an ice bath
filled with ice water. When the mixed solution temperature reached
5° C. or below, 90 g of 1,8-diazabicyclo[5.4.0]-7-undecene (DBU)
was added dropwisely through dripping funnel over 1 hour. After the
dropwise addition, the ice bath was removed and the mixed solution was
further stirred for 8 hours. To the reaction solution, concentrated
hydrochloric acid was added to adjust the pH to 7, and then the solution
was poured into 7 L of water, and the polymer: Resin (I) which is the
specific polymerizable binder related to the invention is precipitated.
The precipitated polymer was filtered, washed with water, and dried to
obtain 95 g of polymer. When the obtained polymer was subjected to
1H-NMR measurement, it was confirmed that 100% of the side chain
groups derived from Compound (i-1) was changed to an ethylene
methacrylate group. The weight-average molecular weight was measured by
Gel Permeation Chromatography (GPC) using polystyrene as a standard
material, and the result obtained was 12,500. The acid value obtained by
titration was 1.44 meq/g (calculated value: 1.50 meq/g).

Synthesis Example 2

(2) Synthesis of Resin (II)

Control Binder

[0264]To a 1,000 ml three-necked flask, 120 g of propylene glycol
monomethyl ether was charged, and heated to 90° C. under nitrogen
flow. Thereto, 120 g of propylene glycol monomethyl ether solution
containing 74 g of benzyl methacrylate, 84 g of methacrylic acid, and
V-601 (manufactured by Wako Pure Chemical Industries, Ltd.) was added
dropwisely over 2 hours. After the dropwise addition, the mixed solution
was further stirred for 2 hours. Thereafter, the reaction solution was
cooled to room temperature, and then poured onto 8 L (liter; same applies
below) of water to precipitate a polymer. The precipitated polymer was
filtered, washed with water, and dried, to obtain 150 g of polymer.

[0265]The weight-average molecular weight of the obtained polymer was
measured by Gel Permeation Chromatography (GPC) using polystyrene as a
standard material, and the result obtained was 12,000. The acid value of
this polymer obtained by titration was 202 mg KOH/g (calculated value:
204 mg KOH/g), confirming that the polymerization was normally performed.

[0266]As above, to a 1,000 ml three-necked flask charged with 40 g of the
obtained polymer, 110 mg of p-methoxyphenol was charged, and further 60 g
of propylene glycol monomethyl ether was added to be dissolved. Thereto,
820 mg of tetrabutylammonium bromide was further added, and heated to
80° C. 10 g of glycidyl methacrylate was added and the mixed
solution was stirred for 6 hours. Then, it was confirmed by gas
chromatography that a peak derived from glycidyl methacrylate was
disappeared. This reaction solution was poured onto 7 L of water to
precipitate a polymer (Dispersion Resin (I)-1). The precipitated polymer
was filtered, washed with water, and dried to obtain 54 g of target
Dispersion Resin (II).

[0267]The weight-average molecular weight of the obtained polymer
(Dispersion Resin (TI)) was measured by Gel Permeation Chromatography
(GPC) using polystyrene as a standard material, and the result obtained
was 17,800. The acid value of this polymer obtained by titration was 120
mg KOH/g.

Example 1

A1. Preparation of Curable Composition

[0268]Here, examples of preparing a curable composition containing a
pigment which is for forming a color filter applicable to liquid crystal
display devices will be mentioned and explained.

(A1-1. Preparation of Pigment Dispersing Solution)

[0269]Preparation of Pigment Dispersing Solution

[0270]A mixed solution of 40 parts by mass of a 30/70 (mass ratio) mixture
of C.I. Pigment Green 36 and C.I. Pigment Yellow 219 (primary particle
diameter of 32 nm) as the pigment, 50 parts by mass (about 22.6 parts by
mass in terms of solid content) of BYK 2001 (Disperbyk: manufactured by
BYK-Chemie, concentration of solid content of 45.1 mass %) as the
dispersing agent, 5 parts by mass of the specific polymerizable binder
[Resin (I)] related to the invention, and 110 parts by mass of ethyl
3-ethoxypropionate as a solvent, was blended/dispersed for 15 hours using
Bead Mill to prepare Pigment Dispersing Solution (P1).

[0271]With respect to the Pigment Dispersing Solution (P1), the average
particle diameter of the pigment measured by dynamic light scattering
(with the use of Microtrac Nanotrac UPA-EX 150 (manufactured by Nikkiso
Co., Ltd) without further diluting P1) was 61 nm.

[0273]The curable composition containing the above pigment was used as a
resist solution to be slit coated on a glass substrate of 550
mm×650 mm under the conditions below, then left still in that state
for 10 minutes, and vacuum dried and brought into pre-baking (100°
C. for 80 sec), to form a curable composition-coated film (curable
composition film).

[0274]Thereafter, the photocurable coated film was pattern exposed using a
2.5 kW extra-high pressure mercury lamp with a photo mask for a test
having a line width of 20 μm, and after the exposure, a whole area of
the coated film was soaked in a 10% aqueous solution of organic-based
developer (trade name: CD, manufactured by Fuji film electronics material
Co., Ltd.) and left for 60 seconds.

A2-3. Heating Treatment

[0275]After being left, the developer was washed off by showering with
pure water, and the coated film subjected to photocuring treatment and
development treatment was heated in an oven at 220° C. for 1 hour
(post baking). Accordingly, a color filter formed from the coated film
(colored film) of a curable composition on a glass substrate was
obtained.

A3. Performance Evaluation

[0276]Storage stability of the coating liquid comprising the curable
composition prepared in the above manner, exposure sensitivity of the
curable composition coated film (colored film) formed on a glass
substrate by applying the curable composition, substrate adhesion,
developability, and pattern cross-sectional shape, were evaluated in the
following manner. The results are shown in Table 1.

(A3-1. Storage Stability of Curable Composition)

[0277]The curable composition (coating liquid) prepared in the above
manner was stored at room temperature for 1 month, and then viscosity of
the liquid was measured. Evaluation was made in accordance with the
following standard.

[0281]The curable composition coated film was exposed by varying the dose
of irradiation within the range of 10 to 100 mJ/cm2, and the dose of
irradiation giving a pattern line width after the post-baking of 20 μm
was evaluated as the exposure sensitivity. The smaller the value for
exposure sensitivity the higher the sensitivity.

[0283]In the exposure step, presence of a residue on a light-unirradiated
part (unexposed part) was observed, and the developability was evaluated.

--Evaluation Standard--

[0284]A: no residue was confirmed at all in an unexposed part

[0285]B: slight residue was confirmed in an unexposed part only by a
degree of causing no practical problem

[0286]C: notable residue was confirmed in an unexposed part

<Pattern Cross-Sectional Shape>

[0287]A cross-sectional shape of the pattern formed was observed. The
pattern cross-sectional shape is most preferably in a forward tapered
shape, secondly preferably in a rectangular shape. An inverse tapered
shape is not preferable.

<Substrate Adhesion>

[0288]Evaluation of the substrate adhesion was carried out by observing
whether or not the patterning failure is generated. An evaluation
standard is shown as below.

--Evaluation Standard--

[0289]A: patterning failure is not at all observed

[0290]B: patterning failure is hardly observed, but observed in some parts

[0291]C: patterning failure is notably observed

Examples 2 to 7

[0292]Color filters were prepared in the same manner as in Example 1,
except that Resin (I) for the curable composition prepared in Example 1
was replaced by the specific polymerizable binder described in Table 1
below. The same evaluations as in Example 1 were carried out, and the
results are shown in Table 1.

Comparative Example 1

[0293]A color filter was prepared in the same manner as in Example 1,
except that Resin (I) for the curable composition prepared in Example 1
was not used. The same evaluations as in Example 1 were carried out, and
the results are shown in Table 1.

Comparative Example 2

[0294]A color filter was prepared in the same manner as in Example 1,
except that Resin (I) for the curable composition prepared in Example 1
was replaced by Resin (II) obtained in Synthesis Example 2 as the
comparative binder polymer. The same evaluations as in Example 1 were
carried out, and the results are shown in Table 1.

[0295]From the results in Table 1, it is clear that the curable
compositions of Examples 1 to 7 each containing the specific
polymerizable binder exhibit excellent storage stability in a solution
state thereof. In addition, it was realized that when colored patterns
were formed on a support using this curable composition, a color filter
exhibiting high exposure sensitivity, excellent developability, as well
as both the excellent substrate adhesion and pattern cross-sectional
shape, can be obtained as compared to cases of Comparative Example 1
where the specific polymerizable binder was not used and Comparative
Example 2 where Resin (II) was used as the comparative binder.

Example 8

[0296]Hereinbelow, examples of preparing a curable composition containing
a coloring agent (pigment) which is for forming a color filter applicable
to solid-state image pickup devices will be mentioned and explained.

B1. Preparation of Resist Solution

[0297]Following compounds of formulation were mixed and dissolved to
prepare a resist solution.

[0298]A silicon wafer of 6 inch was heated in an oven at 200° C.
for 30 minutes. Next, the resist solution was applied on this silicon
wafer to give a dry film thickness of 1.5 μm, which was then dried by
further heating in an oven at 220° C. for 1 hour to form an
undercoat layer, accordingly a silicon wafer substrate provided with an
undercoat layer was obtained.

B3. Preparation of Pigment Dispersing Solution

[0299]A mixed solution of 40 parts by mass of a 30/70 (mass ratio) mixture
of C.I. Pigment Green 36 and C.I. Pigment Yellow 219 (primary particle
diameter of 32 nm) as the pigment, 50 parts by mass (about 22.6 parts by
mass in terms of solid content) of BYK 2001 (Disperbyk: manufactured by
BYK-Chemie, concentration of solid content of 45.1 mass %) as the
dispersing agent, 5 parts by mass of Resin (I) which is the specific
polymerizable binder related to the invention, and 110 parts by mass of
ethyl 3-ethoxypropionate as a solvent, was blended/dispersed for 15 hours
using Bead Mill to prepare Pigment Dispersing Solution (P1).

[0300]With respect to the Pigment Dispersing Solution (P1), the average
particle diameter of the pigment measured by dynamic light scattering was
200 nm.

B4. Preparation of Curable Composition (Coating Liquid)

[0301]The curable composition liquid was prepared by mixing with stirring
to give the following formulation with the use of dispersion-treated
Pigment Dispersing Solution P1.

B5. Preparation and Evaluation of Color Filter from Curable Composition

Pattern Formation and Sensitivity Evaluation

[0302]The curable composition prepared in the above manner was applied
onto the undercoat layer of the silicon wafer provided with an undercoat
layer which is obtained in B2, to form a colored film (coated film). The
colored film was heated at 100° C. using a hot plate for 120
seconds (pre-baking) to give a dry film thickness of the coated film of
0.7 μm.

[0303]Then, the colored film was exposed to a 365 nm-wavelength light
through a mask with a 2 μm square island pattern at various exposure
doses of 50 to 1,200 mJ/cm2 by an i-ray stepper exposure apparatus
FPA-3000i5+ (manufactured by Canon Inc.).

[0304]Thereafter, the silicon wafer substrate with the irradiated coated
film was placed on a horizontal turntable of a spin shower developer
(DW-30, manufactured by Chemitronics Co., Ltd.), and was paddle-developed
at 23° C., for 60 seconds by using CD-2000 (manufactured by Fuji
film electronics material Co., Ltd.), to form a colored pattern on the
silicon wafer substrate.

[0305]The silicon wafer having the colored pattern formed thereon was set
to the horizontal turntable by vacuum chuck. While the silicon wafer
substrate was rotated at 50 r.p.m. by a rotating apparatus, the substrate
was rinsed by showering with pure water from a spout nozzle located above
the rotation center. The silicon wafer substrate was then spray-dried.

[0306]The size of the colored pattern was measured by using a length
measuring SEM `S-9260A` (manufactured by Hitachi High-Technologies
Corporation). The dose of irradiation giving a pattern line width of 2
μm was evaluated as the exposure sensitivity. The smaller the value
for exposure sensitivity the higher the sensitivity. The measurement
results are shown in Table 2 below.

[0307]Further, upon forming the colored patterns, developability, pattern
formability, substrate adhesion, and storage stability of the curable
composition were evaluated in the same manner as in Example 1. The color
irregularity of colored patterns formed was also evaluated in accordance
with the standard below. The results are shown in Table 2 below.

<Storage Stability of Curable Composition>

[0308]The curable composition (coating liquid) prepared in above B4 was
stored at room temperature for 1 month, and then viscosity of the liquid
was measured. Evaluation was made in accordance with the following
standard.

--Evaluation Standard--

[0309]A: no viscosity increase was recognized

[0310]B: viscosity increase by 5% to less than 10% was recognized

[0311]C: viscosity increase by 10% or more was recognized

<Color Irregularity>

[0312]For evaluating the color irregularity, the luminance distribution
after the pattern formation was measured and the proportion of pixels
showing less than +5% difference from its average in total pixels was
determined. The evaluation standard is shown as below.

--Evaluation Standard--

[0313]A: pixel showing less than +5% difference from its average is 99% or
more of the number of total pixels

[0314]B: pixel showing less than +5% difference from its average is 95 to
less than 99% of the number of total pixels

[0315]C: pixel showing less than +5% difference from its average is less
than 95% of the number of total pixels

Examples 9 to 14

[0316]All color filters were prepared in the same manner as in Example 1,
except that Resin (I) for the curable composition prepared in Example 8
was replaced by the specific polymerizable binder described in Table 2
below. The same evaluations as in Example 1 were carried out, and the
results are shown in Table 2.

Comparative Example 3

[0317]A color filter was prepared in the same manner as in Example 7,
except that the specific polymerizable binder was not used for the
curable composition prepared in Example 8. The same evaluations as in
Example 1 were carried out, and the results are shown in Table 2.

Comparative Example 4

[0318]A color filter was prepared in the same manner as in Example 7,
except that Resin (I) for the curable composition prepared in Example 8
was replaced by Resin (II) obtained in Synthesis Example 2 as the
comparative binder polymer. The same evaluations as in Example 1 were
carried out, and the results are shown in Table 2.

[0319]From the results in Table 2, it is clear that the curable
compositions (pigment-based) of Examples 8 to 14 each containing the
specific polymerizable binder which are used for forming color filters
applicable to solid-state image pickup devices exhibit excellent storage
stability in a solution state thereof. In addition, it was realized that
when colored patterns were formed on a support using this curable
composition, a color filter exhibiting high exposure sensitivity,
excellent developability, as well as both the excellent substrate
adhesion and pattern cross-sectional shape, with no problem in color
irregularity, can be obtained as compared to cases of Comparative Example
3 where the specific polymerizable binder was not used and Comparative
Example 4 where Resin (II) was used as the comparative binder.

[0320]From these results, it is clearly understood that excellent pattern
formability can be also realized in the case of preparing a color filter
applicable to solid-state image pickup devices as in the case of
preparing a color filter applicable to liquid crystal display devices, by
the curable composition of the invention.

Example 15

[0321]Hereinbelow, examples of preparing a curable composition containing
a dye which is for forming a color filter applicable to solid-state image
pickup devices will be mentioned and explained.

C1. Preparation of Resist Solution and Preparation of Silicon Substrate
with Undercoat Layer

[0322]The silicon substrate with an undercoat layer was prepared in the
same manner as in [B1. Preparation of Resist Solution] and [B2.
Preparation of Silicon Substrate with undercoat layer] sections of
Example 11.

C2. Preparation of Curable Composition (Coating Liquid)

[0323]Following compounds of formulation were mixed and dissolved to
prepare a color sensitive resin composition.

C3. Preparation and Evaluation of Color Filter from Curable Composition

[0324]Preparation and evaluation of the color filter were carried out in
the same manner as in [B5. Preparation and Evaluation of Color Filter
from Curable Composition] section above. The results are shown in Table
3.

Examples 16 to 21

[0325]All color filters were prepared in the same manner as in Example 8,
except that Resin (I) for the curable composition prepared in Example 15
was replaced by the specific polymerizable binder described in Table 2
below. The same evaluations as in Example 1 were carried out, and the
results are shown in Table 3.

Comparative Example 5

[0326]A color filter was prepared in the same manner as in Example 15,
except that Resin (I) for the curable composition prepared in Example 15
was replaced by pentaerythritol triacrylate. The same evaluations as in
Example 8 were carried out, and the results are shown in Table 3.

Comparative Example 6

[0327]A color filter was prepared in the same manner as in Example 15,
except that Resin (I) for the curable composition prepared in Example 15
was replaced by Resin (II) obtained in Synthesis Example 2 as the
comparative binder polymer. The same evaluations as in Example 8 were
carried out, and the results are shown in Table 3.

[0328]From the results in Table 3, it is clear that the curable
compositions (dye-based) of Examples 15 to 21 each containing the
specific polymerizable binder which are used for forming color filters
applicable to solid-state image pickup devices exhibit excellent storage
stability in a solution state thereof. In addition, it was realized that
when colored patterns were formed on a support using this curable
composition, a color filter exhibiting high exposure sensitivity,
excellent developability, as well as both the excellent substrate
adhesion and pattern cross-sectional shape, can be obtained as compared
to cases of Comparative Example 5 where pentaerythritol triacrylate was
used as the comparative binder instead of the specific polymerizable
binder and Comparative Example 6 where Comparative Resin (II) was used.

[0329]From these results, it is clearly understood that excellent pattern
formability can be also realized in the case of preparing a color filter
applicable to solid-state image pickup devices as in the case of
preparing a color filter applicable to liquid crystal display devices, by
any of the curable compositions of Examples 15 to 21.

[0330]Some of the preferred embodiments of the invention will be shown
below.

[0331]<1> A curable composition for a color filter comprising a
polymerizable compound (A), a photopolymerization initiator (B), a
coloring agent (C), and a binder resin (D) having an acid group and an
unsaturated double bond;

[0332]wherein the amount of the coloring agent (C) in the curable
composition is in the range of 30 to 85 mass %, and

[0333]the acid group of the binder resin (D) having an acid group and an
unsaturated double bond is linked on a main chain via a linking group
with a main backbone of two or more atoms, and the unsaturated double
bond of the binder resin is on a side chain.

[0334]<2> The curable composition for a color filter according to
<1>, wherein the binder resin (D) having an acid group and an
unsaturated double bond is a copolymer that includes a monomer comprising
an acid group, and a monomer comprising an unsaturated double bond, and
wherein the monomer comprising a double bond is represented by Formula
(1), (2), or (3):

##STR00064##

[0335]wherein in Formulas (1)-(3), A1, A2, and A3 are each
independently an oxygen atom, a sulfur atom, or --N(R21)-- while
R21 is an optionally substituted alkyl group; G1, G2, and
G3 are each independently a divalent organic group; X and Z are each
independently an oxygen atom, a sulfur atom, or --N(R22)-- while
R22 is an optionally substituted alkyl group; Y is an oxygen atom, a
sulfur atom, an optionally substituted phenylene group, or
--N(R23)-- while R23 is an optionally substituted alkyl group;
and R1 to R20 are each independently a monovalent organic
group.

[0336]<3> The curable composition for a color filter according to
<1>, wherein the binder resin (D) having an acid group and an
unsaturated double bond can be obtained by one of the following synthesis
methods (a) or (b):

[0337](a) a method which includes using a base group to remove a proton
from a polymer including a compound represented by Formula (4-1) as the
copolymer component, thereby eliminating L, so as to obtain a polymer
having a structure represented by Formula (1), wherein L in Formula (4-1)
is an anionic releasing group; or

[0338](b) a method which includes subjecting a polymer including a
compound represented by Formula (4-2) as the copolymer component to a
base treatment to cause a releasing reaction in a specific functional
group, removing X1 and Z1 in the formula, and forming a
radically reactable group, so as to obtain a polymer having the structure
represented by Formula (1),

##STR00065##

[0339]wherein in Formula (4-1), L is an anionic releasing group; and
R3 to R6, A1, G1, and X have the same meanings as
defined in Formula (1), and

[0340]wherein in Formula (4-2), R1, R2, and R3 are each
hydrogen or a monovalent organic group; A2 is an oxygen atom, a
sulfur atom, or --NR8--; G1 is an organic linking group;
R8 is hydrogen or a monovalent organic group; n is an integer of 1
to 10; R4 to R6, A1, and G1 have the same meanings as
defined in the Formula (1); and X1 is a releasing group which can be
removed by the releasing reaction.

[0341]<4> The curable composition for a color filter described in
<1>, further comprising a sensitizer.

[0342]<5> The curable composition for a color filter according to
<1>, wherein the amount of coloring material in the curable
composition is 40 mass % or more.

[0343]<6> A color filter having colored patterns, which is formed
from the curable composition for a color filter described in <1>.

[0344]<7> The color filter according to <6>, used in an image
sensor.

[0345]<8> A manufacturing method for a color filter comprising:

[0346]forming a colored film formed from the curable composition for a
color filter according to <1>, by applying the curable composition
onto a support;

[0347]exposing the colored film through a mask; and

[0348]developing the exposed colored film to form colored patterns.

The disclosure of Japanese Patent Application No. 2006-356376 is
incorporated herein by reference in its entirety.